Calculating typewriter



Nov.""21,"1933. c. scHLUNS CALCULATING TYPEWRITER Filed March 20, 1928 SSheets-Sheet l 5 Sheets-Sheet 2 r rr lr lqlqlq l I I l I l C. SCHLUNS CALCULATING TYPEWRITER Nov. 21, 1933.

Filed March 20, 1928 Nov. 21, 1933. c. SCHLUNS CALCULATING TYPEWRITER 5 Sheets-Sheet 3 Filed March 20, 1928 I l i l I Ill llulll NOV. 21, 1933. q SCHLUNS 1,936,034

CALCULATING TYPEWRITER Filed March 20, 1928 5Sheets-Sheet 4 5a 4 5a 5 a (m luns Nov. 21, 1933. Q SOHL NS 1,936,034"

CALCULATING 'IYPEWRITER Filed March 20, 1928 5 Sheets-Sheet 5 Sch 1775 M/ve/v rag Patented Nov. 21, 1933 UNITED STATES PATENT OFFICE CALCULATING TYPEWRITER Carl Schliins,

signer to Mercedes Aktiengesellschaft, Germany Steglitz, near Berlin, Germany, as-

Buromaschinen-Werke,

Zella-Mehlis, Thuringia,

14 Claims.

This invention refers to calculating typewriting machines with several cross-adding or totalizing mechanisms, and it is particularly intended to provide means of facilitating the operation of these cross adding mechanisms, to simplify the construction of the machine and to facilitate the manipulation, and in particular the totalizing action thereof. Machines of the kind referred to are for instance employed in cases where in the making up of accounts different denominations of items have to be totalized, such as for instance in the case where besides the values of coins other valuations such as cubic feet, cubic meters, kilowatt-hours and the like have to be considered.

' The construction of the devices of the kind referred to according to the previous art was comparatively complicated and such devices were therefore rather expensive on account of these difliculties. Thus it was necessary for instance to employ for each cross adding mechanism a special reversing gear which had to be controlled by special connecting members. There was the further drawback that the cross adding mechanisms, in order to become engaged with their respective reversing gears had to be moved through a comparatively long distance, thus giving to shocks and jerking movement, which resulted in a very heavy wearing of the several parts of the machine.

Now these drawbacks and difiiculties are overcome by my invention which provides a separate driving wheel for each cross adding mechanism with the provision that the rotating movement of all such driving wheels is controlled by a single reversing gear. By this means a calculating machine of rather simple construction and with several cross adding mechanisms is produced, which comes up to all requirements of calculation for practical purposes and the manufacture of which is comparatively simple. The construction is such that either only one of the cross adding mechanisms or all of them combined may be coupled with the driving wheels which are operated by way of the reversing gear.

In the drawings the invention is shown in several preferred embodiments by way of exemplification. In the embodiment of Fig. 1 the machine is shown in sectional view on the line I-I of Fig. 2 taken through a power-driven calculating typewriting machine provided with the subject matter of this invention.--Fig. 2 is a front elevation of the calculating typewriting machine with the parts constituting the novel features of the invention shown partly in section on the line II--II of Fig. 1 of the drawings.Fig; 3 is a top plan view of a calculating typewriting machine of this kind in which the plate otherwise covering the driving mechanisms for the calculations is shown partly removed, so as to uncover the novel features.

In Figures 4 to '7 a modified construction of the novelty constituting the invention is shown in different working positions, and as applied to three cross adding mechanisms.

Figures 8 to 11 illustrate another modified construction of the subject matter of the invention for three cross adding mechanisms and in different working positions.

Fig. 12 is a cross section on the line XII-XII of Fig. 8. Fig. 13 is a perspective view of the supporting member required for the journalling of the modified construction according to Figures 8 to 11 of the drawings.

Fig. 14 shows the gearing train from the driving means to the dials of the cross counting mechanism according to Fig. 3 on an enlarged scale.

Fig. 15 shows the driving and coupling means in cross section according to Fig. 2 on an enlarged scale, and

Fig. 16 shows a plan view of the driving and coupling means according to Fig. 3 on an enlarged scale.

In the drawings A indicates the frame of the calculating typewriting machine upon the rails B and C of which the carriage E with the platen roller D is displaceably arranged in the wellknown manner. The carriage E is constantly drawn in one direction from right to left (as seen in Figures 2 and 3) by a carriage spring not shown in the drawings and is shifted one step towards the left in the well-known manner by the usual arresting device F upon the striking of a type lever G against the platen D.

Upon the front side of the typewriting machine the back wall H for the calculating mechanism is disposed which carries all the different calculating mechanisms, while the driving shaft I (Figs. 1 and 2) for the calculating mechanism is journalled in the two side walls A1 and A2 of the frame A. This driving shaft I is constantly rotated in the direction of the arrow 11 by means of the permanently operated motoryengine or the like J and by way of the gear wheels K, L, the shaft M, the sprocket wheel N, the chain 0 and the sprocket wheel P, keyed to the shaft I itself. The arresting wheel Q which is keyed to the shaft I partakes in this rotation. Such an arresting or ratchet wheel is provided for each of the ten calculating keys R. The calculating key levers R1 are rotatably disposed on the frame of the machine, being fulcrumed at the point R2, and are normally retained in the position shown in Fig. 1 by means of the spring R4 which at one end is secured to the hook R3 of the lever R1 and-at its other end is fastened to the stationary hook A3. This position is produced by the engagement of the projection R5 against the stop bar R6. By the depression of the key R the lever R1 is therefore rockedclockwise on its fulcrum R2, and by this movement the lever with its backwardly directed leg releases the pawl S1 displaceably mounted and loosely rotatable on the v shaft I, so that this pawl under the action of the compression spring S2 acting thereupon becomes free to move in the direction of the arrow S3, and will become engaged with its projecting lug S4 with the constantly rotating arresting or ratchet wheel Q.

By this means, as will appear from an inspection of the drawings, the coupling disk S which is loosely disposed on the shaft I and upon which the pawl S1 is displaceably arranged, and which corresponds to the particular depressed key is coupled with the ratchet wheel Q or with the shaft I, so as to make one rotation therewith. In consequence thereof the calculating slide U which by means of the roller T is in engagement as a feeler with the disk S is lowered by the action of the spring U1 working upon it and is raised by the camaction of the disk S. In this movement the slot U2 of the counting slide U, which slot is shaped in accordance with the value of the depressed key, acts upon the shaft Us of a rocking frame secured to the rotatably journalled shaft U4. In pursuance thereof this shaft U4 is turned so asto correspond to the value indicated by the feeling movement of the slide U. Upon the shaft U4 the well-known one-way counting segment V (Figs. 1 and 2) is secured.

The structure of such one way counting segment is shown in particular in Fig. 15 of U. S. Patent 1,270,471, This segment rotates the gear wheel W1 mounted on the shaft W, for an amount to correspond to the value of the movement of the feeler, the said value being transmitted by way of the well-known reversing gear W2, W: or W2, W4, W5 (Fig. 3) respectively to the driving wheels We of the cross counting mechanism 3 either as an addition or a subtraction, the said counting mechanism 3 being moved stepwise to correspond to the movement of the carriage. The gearing and tens transfer mechanism of the cross countme mechanisms is exactly the same as that of the totalizers illustrated in Fig. 14 of U. S. Patent 1,270,471 the only difference is that the cross counting mechanism in the present case is turned through an angle of 90 degrees so that the parts which appear in said patent vertically, appear in the present case in horizontal position.

The wheels W6, W11, W12 and W13 of the present case for instance correspond to the wheels 224, 229, 230 and 231 in Fig. 14 of said patent. The control of the reversing gear W: to W5 is effected by the displacement of the wheel W2 and by means of the levers W1, W3 and the elbow lever W9 which is acted upon by the combs or cams W10 (Fig. 2) adjustably disposed on the vertical counting mechanisms ,2: and 11:1. This control of the operation of the reversing gear does not constitute a subject matter of the invention, so that a more detailed description thereof will be unnecessary. It will be sumcient to know that, when the wheel W: is acting upon the wheelWa an addition will be performed in the cross counting mechanism, while when the wheel W1 is acting upon the wheel W5 by means 91! the intermediate wheel W4 a subtraction will be obtained in the cross counting mechanism. In a similar manner the operation of the vertical counting mechanisms :c and x1 is derived from the shaft W. The particular driving means are not shown in the drawings for the sake of clearness of illustration, as they do not constitute a part of the subject matter of the invention.

Upon the bracket 2 provided on the front wall of the calculating mechanism the cross adding mechanism 3 is mounted in the known manner. The cross adding mechanism 3 which comprises two counting mechanisms 4 and 5 operating independently of each other is carried along in the direction of the arrow 122 by the vertical counting trains and by means of a system of levers not shown. Each of the two cross adding mechanisms 4 and 5 is associated with a driving wheel 6 and 7 respectively which are loosely and rotatably mounted on the driving shaft 8. Between the two driving wheels 6 and 7 a sleeve 11 is axially slidably mounted on the driving shaft 8 and is secured against rotation by means of pins (not shown) engaging in key grooves 9 (Fig. 2). This sleeve 11 is provided at its ends with teeth 12, 12a meshing with teeth 13, 13a of the driving wheels 6 and 7 respectively. The length of the teeth and the arrangement of the wheels 6 and 7 is such that in the intermediate position of the sleeve 11 both of the driving wheels will become engaged therewith and only when the coupling sleeve is displaced into its right hand or left hand extreme position one or theother of the wheels will become engaged with the sleeve.

This displacement and the reversing of the coupling sleeve 11 is effected in the following manner and by means of the vertical counting mechanism. With this purpose in view an angular piece 15 is disposed by means of the screw 16 on the rear wall H of the counting mechanism and on this member 15 a fork-shaped reversing and switching lever 18 is pivotally secured by means of the connecting screw 17. This switching lever 18 carries on its confronting surfaces and at the ends of its two legs the studs 19 and 20 adapted to engage in the ring-shaped groove 21 of the coupling sleeve 11, so as to displace the sleeve upon the rocking of the lever 18. To the upper arm of the lever 18 and by means 125 of the connecting screw 22 the pitman link 23 is pivotally connected the other end of which is linked to one of the legs of the elbow lever 25 fulcrumed to the screw 24, by means of the screw 26. The other leg of this elbow lever 25 carries a roller 130 27 which is acted upon by the bars 28 which are adjustably mounted on the vertical counting trains 3:, 2:1. For this purpose the bar 28 is secured to the levers 28b rockably mounted at the points 28a and connected above the counting 135 train by means of a cross bar 28c. Upon this cross bar 280 a bolt 28d is provided adapted to engage in the notches 28e, 28} and 28g. Ordinarily the reversing lever 18 of the sleeve 11 is adapted to be moved anticlockwise by means of a spring 148 31 secured to the right hand wall of the counting mechanism and engaging the lever 18 by means of a pin 29, so that in the normal position of the parts the teeth 12a of the sleeve 11 will be fully engaged with the teeth 13a of the driving wheel 7,145 while the teeth 12 of the sleeve 11 are out of engagement with the teeth 13 of the driving wheel 6, and consequently only the right hand cross counting mechanism 5 will be operated. In his case the spring actuated bolt 28d is in eng ge- 1 ment with the forward notch 28g so that the bar 28 during the traverse of the corresponding vertical counting train will pass clear of the roller 27 without operating the roller. If, however, the spring bolt 28d at one of the vertical counting trains has become engaged with the center notch 28 the bar 28 of this counting mechanism will rock the elbow lever 25 anticlockwise upon passing the roller 27, so that the sleeve 11 is moved into the center position corresponding to Figs. 2 and 3. in which position the sleeve is engaged both with the teeth 13 of the driving wheel 6 as 'well as with the teeth 13a of the driving wheel 7, so that both these cross counting mechanisms 4 and 5 will be operated.

When the spring bolt 2811 is caused to be engaged with the notch 28c farthest to the rear, the elbow lever 25 is still further rocked anticlockwise during the movement of the particular bar 28, so that the sleeve 11 will then become fully disengaged from the teeth 13a of the driving wheel 7 and will be fully engaged with the teeth 13 of the driving wheel 6, so that the left hand cross counting mechanism 4 is operated.

' To the rearwardly bent extension 32 (Figs. 1 and 3) of the front wall 1 of the calculating mechanisman angular slide 33 is displaceably connected by means of the screws 35 which pass through the longitudinal slots 34, and the recessed parts of the slide 36 will engage with the reversing and switching lever 18, while the recessed parts 37 and 33 constitute two lugs or shoulders 39 and 40. The recesses 37 and 38 are of such size that the projections 39 and 40 formed by these recesses will be adapted to release the driving wheels 6 and 7m the intermediate position of the sleeve 11, while they will, on the other hand, prevent the turning of the driving wheel 6 or 7 respectively which is not connected to the driving shaft 8 by means of the coupling sleeve 11 at the particular instance.

In Figs. 4-7 a modified construction is shown which may be preferably employed in case more than two cross counting mechanisms, three of them for instance, are disposed adjacent each other. With this form of construction the gear wheels 106 to 108 which are directly actuating the cross adding mechanisms and which correspond to the wheels 6 and 7 of Figs. 2 and 3, are loosely arranged upon a shaft 8a which is disposed separate from the driving shaft 8. The sleeve 11a is displaceably. but unrotatably' mounted'on the shaft 8 and to this sleeve the wheels 116, 117, 1170, 118 and 1180 are connected. The sleeve 11a is acted upon by the lever 18 shown in Fig. 3 which is normally rocked by the spring 30 and assumes a position in which the wheel 118 becomes engaged with the wheel 108 (Fig. 7). To the sleeve 11a the locking slide 33a is positively connected so that it will follow the axial displacement of the sleeve 11a. The locking slide 33a has only been shown diagrammatically in Figs. 4 to 7 for the sake of clearnes's of illustration, but normally its position corresponds to the position of the slide 33 shown in Figs. 2 and 3. In the position of the sleeve 11a shown in Fig. 7 the arresting slide 33a would also assume the position indicated in this figuregin which position the notch a is opposite the wheel 108 while the wheels 106 and 107 are locked against rotation by the lugs b and respectively 0. When the machine is operated only the cross adding mechanism 5aa will be operated in this case. Upon now moving the sleeve 11a and the locking slide 33a in consequence thereof in the direction of the arrow 3 by means of a vertical counting train and for the value of one counting unit, the wheel 118 will be disengaged from the wheel 108 while the wheel 117 will become simultaneously engaged with the wheel 107. At the same time, however, the notch or recess d will be placed opposite the wheel 107, while the lug e assumes its operative position with relation to the wheel 108 and the lug b remains in its arrested position with relation to the wheel 106 (Fig. 6). If now the machine is operated, only the cross adding mechanism 5a will carry out. a calculation.

By a further displacement of the sleeve 11a in the direction of the arrow 1 the parts will assume the position corresponding to Fig. 5 of the drawings in which the recess 1 is opposite the wheel 106, while the lugs g and e are arresting the wheels 107 and 108. In this position only the cross adding mechanism 4a will carry out a calculation upon the operation of the machine. If now the sleeve 11a is again displaced for one counting unit in the direction of the arrow 11, the wheels 116, 117a and 118a will become engaged with the driving wheels 106, 107 and 108, while at the same time the recesses h and i are positioned opposite the wheels 107 and 108 and the recess f of double width is opposite the wheel 106. If the machine is operated with this adjustment all three cross adding mechanisms 4a, 5a and 5110 will carry out a calculation. I 105 By the arrangements according to Figs. 4 to-7 the direction of rotation of the wheels 106 and 107 and. 108 is reversed with relation to the rotation of the wheels 6 and 7, so that now subtraction will be effected instead of addition without 1 0 any special arrangements. The proper direction of rotation may, however, be directly obtained from the start by carrying out the setting of the combs Wm in the opposite direction with relation to the arrangements shown in Figs. 1 to 3.

In the form of construction according to Figs.

8 to 11 the reverse adjustment of the combs Wm is not necessary, as will appear from the following description. As far as the parts shown in Figs. 8

to 11 of the drawings are the same as those shown 120 in the modified construction of Figs. 4 to 7, the same reference characters are used with the addition of an index The driving wheels 106 to 108 are here shown to constitute hollow cylinders 10611 to 108a which are provided at their inner sides with two teeth Z each (see particularly Fig. '12). The hollow cylinders 106a to 108a are journalled in this case in, the arms 121 of a supporting member 122 (Fig. 13) to be secured to the frame of the machine, the cylinders being moreover secured against axial displacement between the arms. Clasps 123 which are secured by means of screws 124 to the arms 121, retain the hollow cylindrical wheels 106 to 108' rotatably in the arms 121. 125 of the supporting member 122 the shaft 8 is rotatably mounted upon which the sleeve 11a carrying the wheels 116, 117', 117a, 118', 118a is displaceably arranged within the wheels 106' to 108'. As in the case of the form of construction according to Figs. 4 to 7, the locking or arresting bar 33a'.is likewise carried along by .the movement of the sleeve 11a, so that by this means the wheels which are not to be moved will be locked.

It appears from Fig. 8 that the teeth Z of 'the wheels 106' to 108' are in engagement with the wheels 116', 117a and 118a, so that all three driving wheels 106', 107' and 108 and consequently all three cross adding mechanisms 4113150 In the lateral arms 135 5a and 511a are simultaneously operated. In all other respects the mode of operation of the arrangement according to Figs. 8 to 11 will be inferred directly by comparing Figs. 8 to 11 with the mode 0! operation described with relation to Figs. 4 to 7, so that there is no necessity of any particular description with regard to the several positions of the parts according to Figs. 8 to 11.

It should be noted as a matter of course that in the arrangement according to Figs. 4 to 11 the additional displacement of the sleeve 11:: and respectively of the sleeve 11a with relation to the vertical counting mechanisms :c and :01 will require the provision of an additional notch for the spring pin 28d. The arrangement of the form of construction shown in Figs. 4 to 11 may also be employed in the manner described in connection with more than three cross adding mechanisms.

It should be understood that besides the modiflcations shown the invention is susceptible of other changes or modifications in accordance with difierent conditions of use and the convenience oi. the operator and without deviating from the spirit and scope of the invention, as herein set forth by the appended claims.

I claim:

1. In a calculating type-writing machine in combination, a series of cross-adding mechanisms, driving means for each of said mechanisms, a single reversing gear, a coupling member for operatively and selectively engaging said reversing gear with the desired driving means, and operating and adjusting means for the reversing gear.

2. In a calculating type-writing machine in combination, a series of cross adding mechanisms, driving means for said mechanisms, a reversing gear in common for said driving means, and regulating and controlling means intermediate the reversing gear and the driving means, and setting means for said regulating and controlling means, adapted to connect the controlling means selectively with certain of the cross adding mechanisms and their corresponding,

driving means, and operating and adjusting meansfor the reversing gear.

3. In a calculating type-writing machine in combination, a series of cross-adding mechanisms, a single driving means for each of said mechanisms, a reversing gear in common for said driving means, regulating and controlling means and coupling means intermediate the driving means, setting means for said controlling and coupling means, adapted to cause selective operation of said driving means, and vertical counting trains, operatively engageable with the controlling and coupling means.

4. In a calculating type-writing machine in combination, a series of cross adding mechanisms, a driving wheel for each oi said mechanisms, a reversing gear in common for said driving wheels, operating means for the reversing gear, a coupling and controlling sleeve intermediate the reversing gear and the driving wheels, and means to selectively engage said coupling and controlling means alternatingly with eit r one of the driving wheels or simultaneously with both 01' the driving wheels.

5. In a calculating type-writing machine in combination, a series oi. cross adding mechanisms, a driving means for each of said mechanisms, a reversing'gear in common for said driving means and operating and setting means for said reversing gear, coupling and controlling means intermediate the driving means and the reversing gear, selective operating means for the coupling and controlling means, vertical counting trains, setting means on said trains engaging the said se-- lective operating means, and therebydetermining the selection and operation of the respective cross-adding mechanisms.

6. In a calculating type-writing machine in combination, a series of cross adding mechanisms, and driving means for said mechanisms 0. reversing gear in common for said driving means, and operating and setting means for said reversing gear, coupling and controlling means intermediate the driving means and the reversing gear, and selectively engageable with the driving means, a bar having holding teeth for the unselected driving and cross-adding mechanisms, and operatively connected to the coupling and controlling means.

7. In a calculating type-writing machine in combination, a series of cross adding mechanisms, and a driving means for each of said mechanisms, a reversing gear in common for said driving means, and operating means for said reversing gear, coupling and controlling means intermediate the driving means and the reversing gear, and selectively engageable with the desired driving means and the cross-adding mechanisms, two adjustable cams, respectively engageable with the coupling and controlling means and 105 with the reversing gear, and adapted to determine the selection of the cross adding mechanism and of the direction of rotation thereof and the respective kind of calculation.

8. In a calculating type-writing machine in combination, a series of cross adding mechanisms, a driving means'for each of said mechanisms, a reversing gear in common for said driving means, and operating means for said reversing gear, coupling and controlling means intermediate the driving means and the reversing gear, selectively engageable with the desired driving means and the cross-adding mechanisms, rectilinearly movable vertical counting trains, and two adjustable cams on said trains, respectively engageable with 2 the coupling and controlling means and with the driving means and adapted to select the kind of calculation and the desired cross adding mechamsm.

9. In a calculating type-writing machine in combination, a series of cross adding mechanisms. a driving means for each of said mechanisms, a reversing gear for said driving means, a tubular, axially displaceable clutch, and coupling teeth on the clutch, selectively and in common engageable with the desired driving means, and operat-' ing and setting means for the clutch whereby each cross-adding mechanism can be operated per se or all of said mechanisms operated together.

10. In a calculating type-writing machine in combination, a series of cross adding mechanisms, driving means for said mechanisms, a reversing gear for said driving means, an axially displaceable clutch between the driving means, coupling teeth on the clutch, adapted to become operatively engaged with two of the driving means in the central position of the clutch with relation to the driving means, and with but one or said driving means in other positions of the clutch, and operating means for the clutch.

11. In a calculating type-writing machine in combination, a series of cross adding mechanisms, driving means for said mechanisms, a reversing gear for said driving means, an axially 150 displaceable member between the driving means, engaging means on the axially displaceable member adapted to become operatively engaged with all of the driving means in one position of the said member with relation to the driving means and with but one of said driving means-in other positions of the said member, and operating means for the axially displaceable member.

12'. In a calculating type-writing machine in combination a series of cross adding mechanisms, driving means for each of said mechanisms, a single reversing gear, a coupling member for operatively and selectively engaging said reversing gear with the desired driving means, operating and adjusting means for said reversing gear, a paper carriage and means on said paper carriage for automatically selecting the coupling position of said coupling member during the movement of said carriage.

13.'In a calculating type-writing machine in combination a series of cross adding mechanisms,

driving means for each of said mechanisms, 9. single reversing gear, a coupling member for operatively and selectively engaging said reversing gear with the desired driving means, operating and adjusting means for said reversing gear, a paper carriage, totalizers on said paper carria'ge and means on said totalizer for determining the coupling position of said coupling member at the entrance of said totalizers into' their calculating zone.

14. In a calculating type-writing machine in combination, a series of cross adding mechanisms, driving means for said mechanisms, a reversing gear in common for said driving means, operating and setting means for said reversing gear, coupling means intermediate the reversing gear and the driving means, locking means for said driving means, a paper carriage and common controlling means for said coupling and locking means settable by said paper carriage.

CARL SCHL'UNS. 

